Improvement in tenon-machines



UNITED STATES.

PATENT Ormea.

WILLIAM PRUETT, OF KOKOMO, INDIANA.

IMPROVEMENT IN TENON-MCHINES.

Specification forming part of Letters Patent No. 56,445, dated July 17, 1866.

To all rwhom it may concern Beit known that I, WILLIAM PRUn'rtr, of the town of Kokomo, in the county of Howard and State of Indiana, have invented new and useful Improvements in Tenoning-Machines; and I do hereby declare that the fol` lowing is a full and complete description of the construction and operation ot' the same, reference being had to the accompanying drawings, making a part ot' this specification, in which- Figure l is a perspective view, and Figs. 2, 3, and 4t are sectional views.

Like letters refer to like parts iu the several views.

A A represent two posts, which constitute a part of the frame of the machine. They are framed into a foot-piece, B, and to the upper ends are framed the horizont-al beams or timbers C, which form ways for the tail-block of the machine, hereinafter to be described.

At the intersection of the posts A and beams C, I attach two uprights, l) D, by means of bolts d, which serve as ways for the crosshead E, which carries the cutters F.

The cross-head E is put in motion by means of a lever, G, and connecting-rod H, the lever Gr having its fulcrum in the beam I, which is supported by journals I in the curved braces J. The end of this lever (shown at G) serves a purpose which willvbe hereinafter explained.

The cutting-instrument consists of two sets of blades, one set on each side of the tenon, and are shown at K L.

K represents a straight spur, projecting at right angles to the direction of the ways C, and cuts the shoulder of the tenon. L represents a cutter, havin gits cutting-edge parallel to the side of the tenon, and by which the side is cut. Both these cutters are adjustable.

M represents guide-rollers, which stand in a vertical position and support the piece to be tenoned during the operation. These rollers l are adjustable in a horizontal 'direction by means of bearings m, by means of which the tenon is adjusted to the cutters.

N represents a tail-block, which serves the double purpose of keeping the piece to be tenoned in an upright position, and also to feed the piece to the cutters.

The tail-blockN has a movement towardand from the cutters LK upon ways N', which are supported upon the beams C. The tail-block N is fed up toward the cutters with regularity at every upward Inovement of the cross-head E by means of the short arm G of the lever G acting upon the cam-lever O. This camlever O has its fulcrum in the shaft 0', which has its bea-rings in the curved braces J The upper end of this lever O is connected to a rod, I), which passes `backward between the ways N and beneath the tail-block N.

The rod P is provided upon the upper side with small notches or teeth, as shown at Q, into one of which the end of a small springcatch, P, (shown imperfectly in Fig. 3,) falls as the rod P is caused to traverse back and forth beneath the tail-block, and by thus engagin g in the teeth successively, at each stroke of the lever G the tail-block is moved toward the cutter, as hereinbefore stated.

Both the face-plate and the binding-screw of the tail-block are adjustable, so that various-sized timber can be introduced and adjusted to suit the thickness of the shoulder ot' the tenon.

By raising the spring-catch P' out of the teeth Q the tail-block can be shovetbback to its place of starting.

The operation of this machine is as follows: The stuff to be tenoned is first dressed to its proper size and form and the tenons laid out. The piece is then adjusted in the tail-block to correspond with the position of the cutters. The guide-rollers are then properly adjusted, and then by working the lever G the cutters are operated and the piece fed up by the movement of the tail-block.

Having thus fully described my invention, what I claim, and seek to secure by Letters Patent, is

l. The hereinabove described device for feeding the tai1-bl0ck toward the cutters with the upward motion ofthe cross-head by means of the lever G,camlever 0, rod P, teeth Q, and pawl P', attached to the tail-block N, the several parts being constructed and the Whole arranged for use substantially as set In testimony whereof I have signed my forth. name 'to this speeieation in the presence of 2. In combination with the knives L and K, two subscribing Witnesses.

so arranged as to ent the shoulders and sides of the tenon at the same time, a device for WILLIAM PRUETI. 4 l giving` a forward feed to the tail-block, aetnated by the saine lever that communicates mo- Witnesses:

tion to the knives, substantially in the man- BENJ. COOLEY7 4 ner set forth. F. W. WILLIAMS. 

